We are undergraduate students Department of Ichthyology and Aquatic Environment, University of Thessaly, Volos, Greece.We are the 14 th group.
The ingredients we used in Winogradsky column were: 1 whole egg(source of CaCO3 and S), pieces of paper(source of C). These ingredients were mixed with sand that was taken from Anauros beach in Volos(21st March 2016).We filled the bottle with 2/3 sand and the rest with water from the sea. The bottle was placed in the dark .
Today ,10 days after we observed a small change in the column .The precipitate seems to took darker colour .Also we noticed a small odor .
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